Mobile App Developer

Jobgether; Brasil; Remote; BRL 373,000 - 745,000; Part time

Benefits offered by this job

Compensation: USD 50–100/hr

Remote work

Part-time ~15 h/wk

Flexible workflow

Technical impact

Specialized mobile engineering

Clear onboarding expectations

Job summary

Jobgether is seeking a Mobile App Developer as a remote contractor in Brazil to craft, evaluate, and refine challenging mobile coding tasks for AI testing. You will design cross‑platform challenges (TypeScript/JavaScript, Dart), iOS (Swift), or Android (Kotlin), build reliable verifiers, and deliver high-quality reference solutions.

You’ll work independently in a remote, flexible setup. The role emphasizes deep mobile architecture knowledge, debugging complex apps, performance improvements, and

Qualifications

• Significant practical experience in mobile development across platforms (RN/Flutter, iOS, or Android).
• Deep understanding of mobile architecture, state management, asynchronous programming, and lifecycle management.
• Proven ability to debug complex mobile apps and deliver performance improvements.
• Ability to design and craft technical mobile challenges and reference solutions.

Responsibilities

• Create realistic, engaging mobile coding tasks for AI model evaluation.
• Design problems assessing advanced engineering skills across cross-platform, iOS, or Android stacks.
• Develop tasks in TypeScript/JavaScript, Dart, Swift, or Kotlin.
• Define reproducible environments and reproducible development setups for challenges.
• Build deterministic automated verifiers and reference solutions for each task.
• Ensure tasks reflect real-world mobile engineering requirements.
• Meet minimum weekly submission requirements.

Skills

Cross-platform mobile dev

iOS development

Android development

Debugging complex apps

Problem solving

Tools

React Native

Flutter

Swift

Kotlin

Jetpack Compose

Job description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Mobile App Developer based in Brazil.

Join an innovative AI-focused project where your mobile software engineering expertise will help train and evaluate next-generation AI systems. In this remote contractor role, you will design challenging, realistic coding tasks that test AI models on complex mobile development problems. Your work will cover debugging, feature development, code refactoring, application architecture, and performance optimization. You will build reproducible development environments, create reliable automated verification systems, and provide reference solutions for each task. Depending on your specialization, you can contribute to cross-platform, iOS, or Android development. This opportunity is ideal for an experienced mobile engineer who enjoys solving complex technical challenges and helping advance AI capabilities through practical, high-quality engineering work.

Accountabilities:

• Create realistic, engaging, and technically challenging mobile coding tasks using repositories of your choice.

• Design problems that assess advanced engineering skills, including identifying subtle bugs, implementing complex features, managing application state and lifecycle, refactoring code, and improving performance.

• Develop tasks within your area of expertise, including cross-platform applications built with TypeScript, JavaScript, or Dart; iOS applications using Swift; or Android applications using Kotlin.

• Define clear problem statements and establish reproducible development environments for each coding challenge.

• Build deterministic automated verifiers that accept correct solutions across different valid implementations while rejecting incorrect, incomplete, or hard-coded approaches.

• Develop high-quality reference solutions demonstrating effective ways to solve each task.

• Ensure that challenges accurately reflect real-world mobile software engineering requirements and test meaningful technical problem-solving abilities.

• Meet the project's minimum weekly submission requirements, which will be communicated during onboarding.

Requirements:

• Significant practical experience in at least one of the following mobile development tracks:

  • Cross-platform development: TypeScript or JavaScript with React Native, or Dart with Flutter.

  • iOS development: Swift with SwiftUI or UIKit.

  • Android development: Kotlin with Jetpack Compose or the Android View system.

• Deep understanding of mobile application architecture, state management, asynchronous programming, and application lifecycle management.

• Proven ability to debug complex mobile applications, identify root causes, resolve challenging defects, and deliver effective performance improvements.

• Strong problem-solving skills and the ability to design sophisticated coding challenges that reflect realistic engineering scenarios.

• Ability to create reproducible environments, develop reliable automated tests or verifiers, and distinguish robust solutions from incomplete or hard-coded implementations.

• Capacity to produce clear, technically sound reference solutions and work independently in a remote environment.

• Availability to meet minimum weekly task submission requirements.

Benefits:

• Compensation: USD 50–100 per hour as indicated in the listing; actual compensation is output-based, with payment per task that meets project specifications.

• Remote work: Work remotely, with flexibility to organize your workflow.

• Part-time commitment: Approximately 15 hours per week.

• Flexible work approach: Complete tasks using your preferred repositories and established engineering workflow, subject to project requirements.

• Technical impact: Apply your expertise to the development and evaluation of advanced AI systems.

• Specialized engineering work: Focus on challenging mobile development problems across cross-platform, iOS, or Android technologies.

• Clear onboarding expectations: Minimum weekly submission requirements will be communicated during onboarding.

We appreciate your interest and wish you the best!